class_docstr: Megatron BART pretraining
code: def list_available_models(self):
      pass
  
file_path: NeMo/nemo/collections/nlp/models/language_modeling/megatron_bart_model.py
imports: from omegaconf.dictconfig import DictConfig
  from pytorch_lightning.trainer.trainer import Trainer
  from nemo.collections.nlp.models.language_modeling.megatron_t5_model import MegatronT5Model
label_desc: Use image node_id 5 for calling the MegatronBARTModel obj's underlying member method code with example usage: obj.list_available_models() without return types